Sr. Cyber Security Engineer

Description
Seeking a highly skilled and experienced Senior level Security Engineer to join cybersecurity team. This role requires expertise in managing firewalls, Azure security and Active Directory (AD), account management, and incident response. The ideal candidate will possess a deep understanding of network and security frameworks and a proven ability to mitigate risks, respond to security incidents, and ensure the integrity of critical systems. The ability to work on export-controlled projects and with law enforcement is required. The ability to get a top secret security clearance is required, and an existing security clearance is preferred.
Key Responsibilities:
Firewall Management:
- Configure, monitor, and maintain enterprise firewalls to ensure secure network traffic and prevent unauthorized access
- Develop and implement firewall policies and rules based on industry standards and security best practices
- Design and manage network segmentation to protect sensitive data and systems from potential threats
- Troubleshoot and resolve firewall-related incidents and performance issues
- Collaborate with network teams to ensure firewall and network segmentation changes are aligned with organizational goals
- Collaborate with Networking and System Infrastructure team on the maintenance of data center firewall rulesets and routing related to service delivery
Azure Security and Active Directory Management:
- Manage Azure Active Directory as part of a systemwide team, ensuring secure and scalable identity and access management
- Implement and manage security solutions within Microsoft Azure, including configuring security policies, managing resources, and monitoring for vulnerabilities
- Ensure proper configuration and security of Active Directory services, including group policy management, permissions, and role-based access controls
- Contribute to the maintenance of local custom web tools for privilege delegation capabilities of AD/Azure/other management functions
Account Management:
- Oversee user account lifecycle management, including the provisioning, de-provisioning, and auditing of user access to systems
- Ensure adherence to the principle of least privilege across all account management activities
- Conduct regular reviews of user accounts and permissions to identify and mitigate potential security risks
Incident Response:
- Lead and participate in security incident response activities, including investigating, analyzing, and mitigating security incidents
- Hunt for and remediate phishing campaigns, ensuring timely detection and neutralization of threats
- Secure mass email campaigns to prevent misuse and ensure the integrity of organizational communications
- Perform forensic analysis and root cause investigations to determine the scope and impact of security events
- Develop and document incident response procedures and runbooks to improve the organization's response capabilities
- Collaborate with other teams to ensure proper escalation and resolution of security incidents
Vulnerability Management:
- Administer vulnerability management tools, discovery, tracking, and remediation coordination
- Administer Microsoft security environment including Defender, Entra, and Sentinel
- Lead technical security operations including security monitoring and reporting
- Monitor security systems and logs for signs of potential vulnerabilities or breaches
- Develop and maintain security dashboards and reports for Senior management and stakeholders
- Provide guidance on emerging threats, vulnerabilities, and best practices
- Provide oversight to other teams for patch management progress/state as well as help to determine when security issues require immediate vs delayed action
Risk Management and Compliance:
- Ensure that security controls comply with industry regulations, such as CUI, NSPM-33, PCI, HIPAA, NIST 800-171, NIST 800-172, ITAR, NERC, and organizational policies
- Conduct regular security assessments, vulnerability scans, and penetration tests
- Recommend and implement security enhancements based on risk assessments and security audits
- Maintain compliance with export-controlled data regulations and work closely with law enforcement on related matters.
Skills
Security, Firewall, Cloud, SIEM, Vulnerability management
Experience Level
Expert Level
Job Type & Location
This is a Contract to Hire position based out of Rolla, MO.
Pay and Benefits
The pay range for this position is $55.00 - $82.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: Medical, dental & vision Critical Illness, Accident, and Hospital 401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available Life Insurance (Voluntary Life & AD&D for the employee and dependents) Short and long-term disability Health Spending Account (HSA) Transportation benefits Employee Assistance Program Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace Type
This is a fully onsite position in Rolla,MO.
Application Deadline
This position is anticipated to close on Feb 6, 2026.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.

The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

About TEKsystems and TEKsystems Global Services

We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.